Piston-rod joint.



` No. 736,136. Y 'PATENTED AUG.11,1903.

J. nmoFARLANDyJR.

PISTON ROD JOINT.

APPLIOATION FILED sBPT.17, 1902.

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VUNITED STATES Vv1.5atenterl August 111, 1906.

PATENT OFFICE.

JAMES D. MCFARLAND, JR., FRUITVALE, CALIFORNIA, ASSIGNOR OF ONE-HALF TO JOHN BRUCKMAN, OF SAN FRANCISCO, CALIFORNIA.

PlSTON-ROD JOINT.

SPECIFICATIONforming part of Letters Patent No.. 7 36,136, dated August 11, 1903.

Application tiled September 17, 1902. Serial No. 123.692. (No model.)

To a/ZZ whom t may con/cern.-

Beit known thatI, JAMES D. MGFARLAND, Jr., a citizen of the United States, residing at Fruitvale, county of Alameda, State of California, have invented an Improvement in Piston-Rod Joints; and'I hereby declare the following to be a full, clear, andexact description of the same. l

My invention relates to improvements in means for connecting the piston-rods with a crank-shaft, and is particularly applicable in engines having a plurality of radially-disposed cylinders in the same plane. Its object is to confine the connections between the piston-rods and crank-shaft within the narrowest practicablelimits and to provide for V take up when these bearing parts have become worn.

It consists of the parts and the construction and combination of parts hereinafter described and illustrated bythe `accom panying drawings, in which- Figure 1 is a vertical cross-section of one form of my invention. Fig. 2 is a perspective view of segmental plate 4 and brass 8, Fig. 1. Fig. 3 is a vertical cross-section of another form of myinvention. Fig. 4is avertical longitudinal section ofthe form shown in Fig. 3.

A represents an engine-shaft havin g a crank 2, from which radiate the several piston-rods 3. As the invention pertains to the connections of these rods with the crank, it has not been deemed necessary to show the cylinders or other parts of the engine.

In Figs. 1 and 2 is shown-a form of pistonrod joint comprising a segmental plate 4, longitudinally slotted, as at 5, and having a cenj,

trally-disposed threaded sleeve portion 6,

, adapted to be screwed onto the end of a piston-rod and locked thereto by set-screws 7. A second segmental plate 8, concentric with and bearing on the crank, is provided with a flange or projection Supon its upper side, tting the slot 5 of plate 4. The iiaiige is centrally enlarged, as at 10, and the slot is correspondingly widened to accommodatel this enlargement, whereby any movement of the parts upon each other is prevented. Any wear may be compensated for by interposing a liner 1l (insertedthrough opening 12 in sleeve 6) between `'plate 4 and brass 8. The

liner may be securely held in place by means of a set-screw 13. These plates are held together and to the crank by means ofthe straps 14, embracing the sides of the plates and having their ends secured to the arms of the crank, as shownin Fig.\l.

In Figs. 3 and 4 isshown another form o joint, which permitsa piston-rod to be conlined within very narrow limitsin fact, the arms ofthe crank need only be separated suficiently to give necessary clearance for the piston-rod. This feature of narrow tread is desirablein manyinstances. As here shown, the piston-rods are slotted centrally at their endsto receive a ring 15, which is slipped on over the crank-elbow. The end of each rod seats upon a" segmental plate 16, which has a portion 17 fitting the slot in the end of the piston-rod and bearing against the ring. Between each plate 16 and the crank is interposed awearing-surface of brass, as 18,which may be replaced from time to time as necessity requires. The parts are held in position about the crank-pin by the bolts 19.

Having thus described myinvention, what I claim, and desireto secure by 'Letters Patent, is

1. The combination, witha crank-shaft, of a `piston-rod, a segmental plate bearing upon the crank, a similar plate secured to the piston-rod said plates having interlocking means between adjacent surfaces, and means for holding the rod to the crank.

2. The combination'ofapiston-rod; acrankshaft; a segmental plate, longitudinally recessed; means for securing the plate to the piston-rod; a second segmental plate, bearing upon the crank-shaft, and having a longitudinally-extending projection to interlock with the recess in the rst-named plate; and means encirclingthe crank-shaft for holding the parts to the crank.

3. The combination of appiston-rod; a crankshaft; a segmental plate; means forI securing said plate to the rod, said plate having alongitudinal slot; a second segmental plate, bearingupon the shaft and having a projection enlarged between its ends and fitting the slot of the first-named plate; and means for holding the plates to the crank.

4. A piston-rod joint comprising a plate roo S3 Y v 736,136

having a centrally-threaded sleeve ttng the In Witnes whereof I have hereunto set; my piston-rod, a segmental Wearing-plate having hand. interlocking means with the first-named late, a liner introduced through said sleevle be- JAMES D' MQFARLAND JR' 5 tween the plates, and a strap engaging the Witnesses:

sides of the plates to hold the parts to lohe S. H. NOURSE, crank. JESSIE C. BRODIE. 

